KR100846935B1 - Bifs realtime controller for dmb broadcasting - Google Patents

Abstract

A controller for controlling supplementary data of a DMB broadcast in real time is provided to allow a user to author and register supplementary data in advance and use them according to a schedule. A supplementary data multiplexer(205) selects one of supplementary data provided from various supplementary data supply sources and outputs the same to an automatic transmission controller that transmits a DMB broadcast. A session management unit(201) maintains a communication session with supplementary data which is received after being authored in real time, and transmits the received supplementary data to the supplementary data multiplexer. A schedule management unit(203) reads broadcast schedule information from a schedule DB(232) at every certain period. A scheduler(204) reads a video file including supplementary data stored in a supplementary data DB and outputs the same according to the broadcast schedule information. When the video file is received, a video file parsing unit(202) parses the supplementary data of the video file, and outputs the same to the supplementary data multiplexer.

Description

BIFS Realtime Controller for DMB broadcasting}

1 is a diagram illustrating a terrestrial DMB broadcasting transmission system in which an interactive data service using the BIFS is implemented.

2 is a diagram illustrating a terrestrial DMB broadcasting transmission system for implementing a bidirectional data service using an additional data real-time controller according to an exemplary embodiment of the present invention.

3 is a block diagram of an internal data real time controller 200 according to an exemplary embodiment of the present invention.

4 is a diagram showing an example of a display output from the monitoring unit according to an embodiment of the present invention.

* Description of the symbols for the main parts of the drawings *

200: real-time additional data controller 201: session management unit

202: video file parsing unit 203: schedule management unit

204: Scheduler portion 205: Additional data multiplexer portion

206: monitoring unit 210: real-time additional data authoring tool

230: content manager 232: schedule DB

234: additional data DB 240: automatic transmission controller

The present invention relates to an additional data real-time controller for selecting and outputting specific additional data from a plurality of additional data input from the outside for DMB broadcasting.

Terrestrial Digital Multimedia Broadcasting (DMB) uses the transport packet structure of the MPEG-2 system layer. In order to transmit a packet of a predetermined size, a broadcast program, that is, broadcast content, is divided into individual streams of a packetized elementary stream (PES) structure, such as audio and video, according to a service, which is then multiplexed into a packet of a constant size.

Since the terrestrial DMB began official service in December 2005 in Korea, the mobile broadcasting reception industry has entered a new era. Unlike satellite DMB, which is formed mainly for mobile phone terminals, terrestrial DMB has been quantitatively expanded in various forms such as vehicle type terminal, dedicated terminal, cellular phone terminal, and USB terminal for PC, and the market has matured. Moreover, the terrestrial DMB market is about to take another leap forward, as services that were limited to the metropolitan area are gradually expanding across the country, starting with trial services by local broadcasting stations.

However, due to the limitation of the free service, the broadcasting companies are struggling because they cannot find a proper profit model. As a way to overcome this situation, bidirectional data service using BIFS has begun to attract attention. The two-way data service is one of the key applications in the age of convergence of broadcast communication, and it can be said that the expectation of not only broadcasters and telecommunications operators but also the entire IT industry is at once.

The bidirectional data service refers to providing information desired by a subscriber immediately when a user wants additional information away from a service that is unilaterally viewed or listened through video or audio. The service is provided by adding binary format (BIFS) information for a scene to an existing video (TV) or audio (radio) as additional data. The BIFS (BInary Format for Scenes) is a scene description standard for free expression of various multimedia organized in object units and interaction with a user, and is an MPEG4 technology originally used to describe scenes shown to users in various multimedia applications. Is part of. In other words, the BIFS is a binary-type expression engine framework that can implement two-dimensional and three-dimensional graphics in MPEG4. The BIFS is a standard for expressing a three-dimensional model. It is binary instead of text based to increase

FIG. 1 is a diagram illustrating a terrestrial DMB broadcasting transmission system in which an interactive data service using additional data in the BIFS form is implemented.

The A / V encoder 110 outputs TS (Transport Stream) data in the form specified in the terrestrial DMB broadcasting standard from the A / V source 140 (audio / video source) to the automatic transmission controller 100. The supplementary data authoring tool 120 receives various image files and text inputs from an operator, decorates a screen, and designates an additional data that can use an interactive service by designating an event. The supplementary data converted according to the BIFS standard is ES ( Elementary Stream) data is output to the automatic transmission controller 100 in the form of data. The automatic transmission controller 100 converts the data ES received by the additional data authoring tool 120 into a TS packet, and includes the same in a TS packet received by the A / V encoder 110 to output the TS packet in MPEG2 form. Do it. The transmitter 130 converts the TS packet from the automatic transmission controller 100 into a form suitable for broadcasting transmission and broadcasts it.

As described above, the supplementary data of the BIFS standard provided by the supplementary data authoring tool 120 is coated on the encoded A / V data by an automatic transmission controller and broadcasted, thereby enabling bidirectional data service with the receiver. As a result, through the terrestrial DMB broadcasting system as shown in FIG. 1, a content provider such as a broadcaster can provide various images and texts in addition to simple audio / video through a supplementary data authoring tool that performs BIFS conversion. In this case, additional data provided according to a user's selection may be provided in the form of a bidirectional data service.

However, the additional data of the BIFS standard authored by the additional data authoring tool 120 is transmitted to the automatic transmission controller 100 in real time, and packetized together with the TS data received by the A / V encoder 110. Data authoring and transmission were limited in their use and efficiency. For example, there is no non-real time interworking method that can author additional data in advance and store and register it in a separate device and later transmit the additional data related to the corresponding broadcasting time zone to the automatic transmission controller.

The present invention has been made to solve the above problems, and proposes a method for selecting a specific additional data from among the additional data input in various forms and outputting it by DMB broadcasting. In addition, the present invention proposes a method of selecting specific additional data from additional data provided in real time and additional data registered in advance and applying the same to DMB broadcasting. In addition, the present invention proposes a method for providing synchronization with corresponding broadcast contents by providing additional data in DMB broadcasting in real time.

The additional data real-time controller of the DMB broadcasting of the present invention comprises: an additional data multiplexer unit which selects only one additional data from among additional data provided from various additional data sources such as an additional data authoring tool and outputs it to an automatic transmission controller for transmitting DMB broadcasting; A session management unit for maintaining a communication session with the supplementary data which is authored and transmitted in real time and outputting the received supplementary data to the supplementary data multiplexer unit, and a video with embedded supplementary data which is previously authored and stored in a predetermined supplementary data DB. A scheduler unit for reading and outputting a file in a corresponding broadcast time zone according to the schedule information, and when receiving a video file with embedded additional data from the scheduler unit, parsing additional data in the video file and outputting the additional data to the additional data multiplexer unit. doing A video file parsing unit, and a schedule management unit for reading broadcast schedule information from a predetermined schedule DB at regular intervals.

In addition, the additional data source includes a real-time additional data authoring tool that is authored and transmitted in real time for use in a DMB broadcasting service, and a non-real-time additional data authoring tool that is registered in advance and called and transmitted in a corresponding broadcast time zone.

The additional data real time controller may further include a monitoring unit configured to monitor and display a connection state with the automatic transmission controller, the real time additional data authoring tool, the schedule DB, and the additional data DB. The monitoring unit may display broadcast schedule information, log information, and additional data input state information together.

The schedule DB and the supplementary data DB may be provided in a content manager which is an external data storage device. The schedule DB may be configured to receive schedule information directly from an operator through a separate communication line when there is emergency schedule information.

In addition, the schedule information, content ID, content name, search word, data type, content storage volume information, file path and file name, file size, playback time, broadcast date, broadcast end date, whether there is additional data, whether approved, copyright Includes information, final data status information, modification date, and registration date.

The additional data DB may be stored and registered in the form of a video file including the additionally authored additional data. The additional data multiplexer may select and output any one additional data based on a predetermined priority.

Hereinafter, the detailed description of the preferred embodiments of the present invention will be described with reference to the accompanying drawings. In the following description of the reference numerals to the components of the drawings it should be noted that the same reference numerals as possible even if displayed on different drawings.

In addition, the following embodiments will be described as an example of the additional data of the BIFS standard as an example of the description of the additional data used for DMB broadcasting, but additional data having various standards in addition to the BIFS standard may be applied to the present invention. Will be self explanatory.

In the following, an MPEG-4 encoded MPEG4 file will be described as an example of a video file embedded with additional data, but MPEG encoded files such as MPEG2 as well as the MPEG4 file, MPEG such as H.261, H.263, etc. It will be apparent that other encoded files that are standard also fall within the video file category of the present invention.

2 is a diagram illustrating a terrestrial DMB broadcasting transmission system for implementing a bidirectional data service using an additional data real-time controller according to an exemplary embodiment of the present invention.

The A / V encoder 250 outputs TS (Transport Stream) data from the A / V source to the automatic transmission controller 240 in the form specified in the terrestrial DMB broadcasting standard. In FIG. 2, the A / V encoder 250 is shown separately from the automatic transmission controller 240, but the A / V encoder 250 is implemented in the automatic transmission controller 240 so that the automatic transmission controller 240 A / V source can be directly input, encoded and output.

The automatic transmission controller 240 includes the BIFS received from the additional data real-time controller 200 together with TS (Transport Stream) data received from the A / V encoder 250 to form an MPEG2 TS packet into a packetized transmitter 260. It prints in). The transmitter 260 converts the TS packet from the automatic transmission controller 240 into a form suitable for broadcast transmission and broadcasts it. Although not shown, in the case of multi-channel broadcasting, a multiplexer for multiplexing a plurality of TS packets for multiplexing of channels may be provided in front of the transmitter.

The additional data authoring tools 210 and 220 provide a function for an operator to author additional data. It receives various image files and text input from the operator, decorates the screen, and assigns events to author additional data that can use interactive services. The supplementary data authoring tool includes a real-time supplementary data authoring tool 210 (BIRT Realtime authoring Tool) and a non-real-time supplementary data authoring tool 220 (BAT (BIFS Authoring Tool)).

The real-time supplementary data authoring tool 210 (BRT) transmits the supplementary supplementary data in real time to the supplementary data real-time controller 200 so that the transmitted supplementary data can be immediately applied to a bidirectional data service capable DMB broadcast. That is, the real-time supplementary data authoring tool converts the authored supplementary data according to the BIFS standard and outputs it as BIFS.

The non-real time supplementary data authoring tool 220 (BAT) provides a function for allowing an operator to author more various and complex additional data in non real time. That is, the screen is decorated with various image files and texts on the background video screen used for the content, and predetermined data is converted into BIFS in the non-real-time supplementary data authoring tool 220, which is designated as a predetermined event, and which can be interactively serviced. The BIFS is output in the form of a video file. The video file, for example, an MPEG4 file, includes, in addition to BIFS, meta information including object descriptors such as an Initial Object Descriptor (IOD) and an Object Descriptor (OD). Hereinafter, the video file will be described using an MPEG4 file as an example. Therefore, the MPEG4 file described below is only an example of a video file.

As described above, the MPEG4 file (video file) including the BIFS authored by the non-real time supplementary data authoring tool 220 is stored and registered in the supplementary data DB 234 in the content manager 230. The video file registered in the additional data DB 234 is later called by the additional data real time controller according to the broadcast schedule and sent to the automatic transmission controller.

The content manager 230 is a middleware system that registers, stores, and manages MPEG4 files including broadcast schedule information and BIFS. To this end, the content manager includes a schedule DB 232 and an additional data DB 234. The schedule DB 232 is a database in which broadcast schedule information is stored, and the additional data DB 234 is non-real time additional data. The database stores and registers additional data transmitted from the authoring tool 220.

The additional data real-time controller 200 (BIFS Realtime Controller) is stored in the BIFS transmitted from the real-time additional data authoring tool 210 and the additional data DB 234 in the content manager to store the MPEG4 file of the corresponding time zone according to the broadcast schedule information. The BIFS is selected from the extracted and parsed BIFS and output to the automatic transmission controller 240. It also monitors the connection status of each system and monitors BIFS transfers.

In order to transmit the BIFS, which is stored in the additional data DB 234 in the content manager 230 and extracted and parsed MPEG4 file of the corresponding time zone according to the broadcast schedule information, to the automatic transmission controller 240, the additional data real-time controller 200 Reads the broadcast content schedule information, extracts the MPEG4 file including the BIFS that is additional data matching the broadcast schedule information from the additional data DB 234, and synchronizes the extracted BIFS with the corresponding broadcast content. 240).

In order to transmit the BIFS to the automatic transmission controller 240 in synchronization with the corresponding broadcast content, the additional data real-time controller 200 extracts descriptors such as IOD and OD from the MPEG4 file read from the additional data DB, Syncs can be achieved by sending BIFS to the automatic dispatcher according to the time stamp's time zone. The object descriptors such as the Initial Object Descriptor (IOD) and the Object Descriptor (OD) describe meta information related to each object media data of MPEG4, and the type, position, characteristic, and size of each object media data are described. It contains a time stamp. At the time specified in the time stamp, the corresponding object media data BIFS is sprayed to synchronize.

 Meanwhile, in FIG. 1, only two real-time additional data authoring tools 210 and non-real-time additional data authoring tools 220 are illustrated as additional data input devices input to the additional data real-time controller 200. It will be apparent that various additional data authoring tools that can be created and provided can be applied as an input device of the additional data real-time controller 200 of the present invention.

3 is a block diagram of an internal data real time controller 200 according to an exemplary embodiment of the present invention.

The session manager 201 maintains a communication session with the real-time supplementary data authoring tool 210 and uses the BIFS transmitted from the real-time supplementary data authoring tool 210 as an elementary stream (ES) to the supplementary data multiplexer unit 205 in real time. send.

The schedule manager 203 periodically retrieves the schedule information of the broadcast from the schedule DB 232 in the content manager 232, and brings the daily schedule information (or weekly / monthly schedule information). The period of retrieving the schedule information periodically retrieves the schedule information every predetermined time (for example, one hour), so that the schedule information can be quickly updated when the broadcast schedule is changed. In addition, in the case of an urgently scheduled schedule, schedule information is manually input from an operator, and for this purpose, a separate communication line (eg, a TCP line) is provided to receive data input from the operator.

The schedule information includes information related to various broadcast schedules, which are described in Table 1 below.

TABLE 1

Name Datatype (size) Comment CONTID NUMBER (10) Content ID CONTNAME VARCHAR2 (256) Content Name SEARCHKEYWORD VARCHAR2 (256) search word DATATYPE VARCHAR2 (8) Data type (MPEG4) VOLID NUMBR (2) About content storage volumes FILENAME VARCHAR2 (128) File path and file name FILESIZE NUMBER (8) File size PLAYTIME NUMBER (7) Play time STARTDATE VARCHAR2 (8) Broadcast date EXPIREDATE VARCHAR2 (8) Broadcast Date BIFSYN VARCHAR2 (1) Whether or not additional data (BIFS) is present (0: none, 1: present) CONFIRMYN VARCHAR2 (1) Approved (0: not approved, 1: approved) COPYRIGHT VARCHAR2 (64) Copyright Information OP VARCHAR2 (1) Final data status information (1: Registration, 2: Correction) OPTIME DATE Date Modified REGTIME DATE registration date

The scheduler 204 reads the MPEG4 file including the BIFS from the additional data DB 234 in the content manager 230 according to the schedule information obtained from the schedule manager 203 and parses the MPEG4 file into the video file parser 202. Pass it on. For example, the MPEG4 file corresponding to the specific content ID recorded in the schedule information is read and transmitted to the video file parsing unit 202 at the corresponding time period.

The video file parser 202 parses and extracts BIFS from the MPEG4 file received from the scheduler 204 and transmits the BIFS to the additional data multiplexer 205. That is, only the BIFS of the object (object) type in the MPEG4 file is parsed and transmitted to the additional data multiplexer unit 205.

The additional data multiplexer unit 205 is authored by the real-time additional data authoring tool 210 and entered in real time through the session manager 201 and registered in the content manager 232 in advance, and the video file parsing unit according to schedule information. Select one of the BIFS coming through the 202 to transmit to the automatic transmission controller 240. The selection may be performed in various ways. For example, the BIFS that is input in real time through the session manager 201 may be output in absolute priority, or the specific BIFS may be selected according to the priority at that time. Can be output.

The monitoring unit 206 monitors and displays a system connection state. That is, the connection status between the schedule DB 232 and the additional data DB 234 in the content manager, the connection status with the real time additional data authoring tool 210, and the connection status with the automatic transmission controller 240 are periodically monitored and displayed. So that the operator can see it. In addition, the schedule information is also displayed so that the operator can view the schedule information.

An example of a display output from the monitoring unit 206 is illustrated in FIG. 4. Referring to FIG. 4, a broadcast start time, a BIFS sync status, a file path, and the like are displayed in a broadcast schedule information field, and operation history information is displayed in a log information field.

In addition, the connection status of each device is displayed in the additional data connection status field. In the drawing, 'BRT' represents an additional data authoring tool that is manually authored, 'BRT-E' represents a real-time additional data authoring tool, and 'SEVA' It represents an automatic delivery controller, and 'Scheduler' represents a content manager. When the status check of each device is displayed in green, it means that it is connected, and when it is displayed in red, it means that it is not connected. In addition, the BIFS input field indicates on which device the BIFS currently being transmitted is being transmitted.

In the above description of the present invention, specific embodiments have been described, but various modifications may be made without departing from the scope of the present invention. Therefore, the scope of the present invention is not to be determined by the embodiments described above, but will be apparent in the claims as well as equivalent scope.

As described above, the present invention enables the DMB broadcasting by selecting specific additional data from various additional data authoring tools by selecting specific additional data among various data input in various forms and outputting the DMB broadcasting. There is. Therefore, since the additional data can be authored and registered in advance and used according to the scheduling, there is an effect of providing an environment in which the additional data can be authored with good time.

Claims (10)

An additional data multiplexer unit which selects only one additional data from among additional data provided from various additional data sources such as an additional data authoring tool and outputs it to an automatic transmission controller for transmitting DMB broadcasting; A session manager which maintains a communication session with additional data that is authored and transmitted in real time and outputs the received additional data to the additional data multiplexer; A schedule manager for reading broadcast schedule information from a predetermined schedule DB at regular intervals, A scheduler unit for reading and outputting a video file having additional data embedded therein in a corresponding broadcast time zone according to the broadcast schedule information read from the schedule management unit, and which is pre-authored and stored in a predetermined additional data DB; When receiving a video file with embedded additional data from the scheduler, the video file parsing unit parses the additional data in the video file and outputs the additional data to the additional data multiplexer. Additional data real-time controller of the DMB broadcast. The method of claim 1, wherein the various additional data sources, An additional data real-time controller for DMB broadcasting including a real-time supplementary data authoring tool that is authored and transmitted in real time for use in a DMB broadcasting service, and a non-real-time supplementary data authoring tool that is registered in advance and is called and transmitted in a corresponding broadcasting time zone. The additional data real time controller of claim 1, wherein the video file is an MPEG4 file. The additional data real time controller of claim 2, further comprising a monitoring unit configured to monitor and display a connection state of the automatic transmission controller, the real time additional data authoring tool, the schedule DB, and the additional data DB. The additional data real-time controller of claim 4, wherein the monitoring unit displays broadcast schedule information, log information, and additional data input state information. The additional data real-time controller according to claim 1, wherein the schedule DB and the additional data DB are provided in a content manager which is an external data storage device. The additional data real-time controller of claim 1, wherein the schedule DB receives broadcast schedule information directly from an operator through a separate communication line when there is emergency scheduled broadcast schedule information. The broadcast schedule information of claim 1, wherein the broadcast schedule information includes content ID, content name, search word, data type, content storage volume information, file path and file name, file size, playback time, broadcast date, broadcast end date, and additional data. , Real-time controller of the additional data of the DMB broadcast, characterized in that it includes approval status, copyright information, final data status information, modification date, and registration date. The additional data real-time controller according to claim 1 or 6, wherein the additional data DB is stored and registered in the form of a video file including previously authored additional data. The additional data real-time controller according to claim 1, wherein the additional data multiplexer selects and outputs one additional data based on a predetermined priority.

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